package com.changgou.file.controller;

import com.changgou.entity.Result;
import com.changgou.entity.StatusCode;
import com.changgou.file.util.FastDFSClient;
import com.changgou.file.util.FastDFSFile;
import org.apache.commons.lang.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
@RequestMapping("/file")
public class FileController {

    @PostMapping("/upload")
    public Result uploadFile(MultipartFile file) {
        try {
            //判断文件是否为空
            if (file == null) {
                throw new RuntimeException("文件不存在,上传失败");
            }
            //获取文件的全名名称
            String originalFilename = file.getOriginalFilename();
            if (StringUtils.isEmpty(originalFilename)) {
                throw new RuntimeException("文件不存在,上传失败");
            }
            //截取文件的后缀名 (jpg)
            String excName = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);
            //获取文件内容(字节数组)
            byte[] content = file.getBytes();

            //创建文件上传的封装实体类
            FastDFSFile fastDFSFile = new FastDFSFile(originalFilename, content, excName);

            //基于工具类进行文件上传,并接收返回参数
            String[] uploadResult = FastDFSClient.upload(fastDFSFile);
            //封装返回的结果
            String url = FastDFSClient.getTrackerUrl() + uploadResult[0] + "/" + uploadResult[1];
            return new Result<>(true, StatusCode.OK, "文件上传成功", url);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new Result<>(false, StatusCode.ERROR, "文件上传失败");
    }
}
